Buscar
Mostrando ítems 1-10 de 1400
Review on space weather in Latin America. 3. Development of space weather forecasting centers
(Elsevier, 2016-03)
The present work is the third of a three-part review of space weather in Latin America, specifically observing its evolution in three countries (Argentina, Brazil and Mexico). This work presents the decision process for ...
Review on space weather in Latin America. 2. The research networks ready for space weather
(Elsevier, 2016-03)
The present work is the second of a three-part review of space weather in Latin America, specifically observing its evolution in three countries (Argentina, Brazil and Mexico). This work comprises a summary of scientific ...
Anthropogenic impacts on mineral weathering: A statistical perspective
(2013-09-01)
Correspondence Analysis was adopted as tool for investigating the statistical structure of hydrochemical and weathering datasets of groundwater samples, with the main purpose of identifying impacts on mineral weathering ...
Gold-bearing iron duricrust in Central Brazil
(1991-11-01)
In the Cuiabá region-State of Mato Grosso, Central Brazil-primary gold mineralization is hosted by two generations of quartz veins in Precambrian metamorphic terrains of the Cuiabá Group. Gold is mined from the veins and ...
Use of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in São Paulo state, Brazil
(Springer, 2003-07-01)
The U-disequilibrium method was utilized to evaluate the velocity of alteration of rocks and fertilizer-derived uranium in the Corumbatai River basin, São Paulo state, Brazil. The Corumbatai River basin is affected by the ...
Dynamic daylight simulation variability in clear sky condition according to selected weather file: satellite data and land-based station data
(Sage Publications Ltd, 2015-12)
While the use of satellite weather files is a possibility in regions without terrestrial stations, it is necessary to consider their impact on daylight simulations. This paper aims to verify the variability of dynamic ...
Review on space weather in Latin America. 1. The beginning from space science research
(Elsevier, 2016-08)
The present work is the first of a three-part review on space weather in Latin America. It comprises the evolution of several Latin American institutions investing in space science since the 1960s, focusing on the ...
Ionospheric TEC Weather Map Over South America
(Amer Geophysical Union, 2016-11-01)
Ionospheric weather maps using the total electron content (TEC) monitored by ground-based Global Navigation Satellite Systems (GNSS) receivers over South American continent, TECMAP, have been operationally produced by ...
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil)Evidências de enriquecimento de etr do tipo ion-adsorption clay no perfil de intemperismo do granito são francisco (São paulo, Brasil)
(2021-08-06)
The rare earth elements and yttrium (REY) ion-adsorption clay deposits (IAC) are important in the global supply chain of these metals, and originated by the weathering of biotite and/or muscovite syenogranite carrying REY ...
Weathering rates at Alto Sorocaba basin, Brazil, using U-isotopes and major cations
(Springer, 2010-09-01)
The aim of this paper was to evaluate the chemical weathering rate at Alto Sorocaba basin, So Paulo State, Brazil, as it is an important parameter on geomorphological characterization of continents. Several tools may be ...